Improvement in stove-grates



G. D. WOODWORTH.

Stove Grate Patented Got. 20. 1868.

Wal-messes.

-ers are most apt to collect, without grinding out or V cure the teeth to the rim by a broad and strong base, to give strength, and at the same time make the ex- GEORGEA D. WOODWORTl-I,

Letters Patent No. 83,232

Or CHICAGO, ILLINOIS.

, dated October` 20, 1868.

IMPROvEMENT IN STOVE-G-RATES.

The Schedule referred to iu these Letters Patent and making part of the same.

To all whom 'it mel/y concern Be it known that I, GEORGE I). WOODWORTH, of Chicago, in the county of Cook, and State of Illinois, have invented a new and useful Improved Stove-Grate; and I do hereby declare and make known that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and the letters and figures marked thereon, which form part of this specification.

My' said invention consists in constructing a stovegrate, having a horizontal rotating Yor reciprocating movement upon its bed, and also a revolving movement upon trunmons orlugs, with an independent rotating or reciprocating centre, which may or may not be provided with teeth, and which may or may not be provided with a stirrer, as hereinafter more fully eX- plained.

Theobject of this feature of my invention is to produce a grate whereby the olinkers or semi-metallic substances, produced by the combustion of hard coal,I may be ground out and removed from the grate by the action of a device operating at the point where said elinkshaking out the coal lying upon the main grate.

My-said invention further consists in constructing the teeth or grate-bars, which project from the circular or outer rim of the grate inwards towards the aforesaid rotating centre, of a triangular form, having their base upon the outer rim and their apex pointing towards the said centre, and in providing said teeth or bars with slots or openings through the same, whether said teeth slope down towards the centre in one inclination, or with two inclines, one lying below and inside the. other, or with one incline and a horizontal inember, this feature being, in fact, wholly irrespective of the configuration ofthe said teeth, as seen in a side view.

The object of this feature of my invention is to separt ofthe terior part or portion of the grate as open as possible, to allow the ashes to fall through the grate readily and to insure an abundant draught of air through the outside portions of the mass of coal in the lire-pot, to cause the fire to burnwith the intensity desired.

My said iiiveiitioiriin'tlier consists in constructing the extreme circumference of the outer rim ofthe grate with a sharp or narrow edge, so that when pieces of coal fall in between said rim and the enclosure of the stove, and prevent the grate from being shaken or moved, the said edge will out or break thepieces of coal so lodged into small pieces, which will readily drop or get free from such position.

To enable those skilled in the art to understand how Figure l represents a plan or top view of my im provement;

and

Figure 3 is avertical central section of the grate, taken at the line z in fig. 1.

Similar letters of reference denote the same parts of the said invention in the different figures.

A represents the circular rim or circumference ofthe grate, and B B the lugs or trunnions upon which it is made to revolve when desired; an angularbit,'B, upon one ofthe said trunnions projecting out, whereby a suitable wrench or handle vmay be applied to the grate for that purpose, said grate resting upon asuitable horizontal bed, so as to be`moved or rotated from side to side, as desired.

Projecting inward and downward from the said rim are arms C, which join at the centre, and form the sup port for a vertical box or bearing, D, in which a central disk or spur, E, is supported upona rotating shaft, F, as is clearly seen in iig. 3.

Exterior to said box D, a vertical arm, G, is attached to the rotating centre E, in the lower end of which, and of the shaft F, holes, g f, are made, in which a rod may be inserted when it is desired to give the saidcenire, E, an independent rotation within the grate. The said centre, E, may be provided with the teeth al, or their equivalent, or the saine may be a plain disk, without teeth or projections, although I consider the toothed form the more desirable and eectual form.

To render the said independent rotating centre, E, still more eiicacious, if desired, a vertical iange, H, may be formed or secured upon the top of the centre, E, as shown, which serves to give a greater shaking or agitation to the clinkers when the centre is rotated or vibrated, causing said'elinkers to be broken between the centre and the points of the teeth l), when the saine readily fall through the annular space, between said centre and the teeth b.

To the said outer rim, the teeth or bars, b, are attached in the manner shown, having the triangular openings through the same, marked e, thus rendering said teeth strong, and at the saine time open, to permit the ashes to fall through and the draught to ascend, as desired.

Upon the outer edge of the rim A, a sharp or thin edge, a, is formed, which is designed to be thin enough so that the saine will operate to break the coal-lumps in pieces, as aforesaid, and yet strong enough to resist the pressure of the coallthereupon.

Having described the construction and operation of Figure 2 is a cross-section through the outer rim;

my invention, I will proceed to specify what I claim, 3. I claim constructing the teeth b with slots, c, suband desire to secure by Letters Patent. Ystantiallly in the manner and for the purposes herein 1. I claim the combination of the rotating indepenspecified. dent centre E, Whether provided with teeth, cl, or not, 4. I claim providing the rim A with zt wire edge, a, with a. grate, A, arranged to operate substantially in as and for the purposes shown and described. the manner herein described.

2. I claim, in combina-tion with the rotating centre, E, Witnesses:

L. L. CoBURN, W. E. MARES.

a stirrer or flange, H, to operate substantially as and for the purposes set forth. 

